Improvement in machines for separating iron from foundry refuse



2 sheetssheet I.

. O. D. WOODRUFF. Machine for Separating Iron from Foundry Refuse.

No. 200,638. v Patented Feb. 26,1878.

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NPETERS, PHOTO-L THOGRAPHER WAsumGToN D C 2 Sheets-Sheet 2.

O. D. WOODRUFP. Machine for Separating Iron from Foundry Refuse.

No. 200,638. Patented Feb. 26, 1878.

NJ'EI'ERS, PHUTOLUTHQGRAPHERI WASHMGTON. 01C

OLIVER D. W OODRUFF, OF SOUTHINGTON, CONNECTICUT.

UNI ED STATES PATE T OFFICE.

IMPROVEMENT IN MACHINES FOR S EPAR ATING IRON FROM FQUNDRY REFUSE.

Specification forming partof Letters Patent No. 200,638, dated February26, 1878; application filed October 22, 1877. I

7 Be it known that I, OLIVER D. WOODRUFF, of Southington, in the countyof Hartford and State of Connecticut, have invented certain new anduseful Improvements in Machines for Separating Iron from Foundry Refuse,of which the following is a" specification:

My invention consists in the peculiar construction and arrangement ofcertain parts, and in the combination of parts, all as hereinafterdescribed. I

In the accompanying drawing, Figure lis a perspective view of a machinefor separating iron from foundry refuse which embodies my invention.Fig. 2 is a vertical section of the same, taken on a linerunninglongitudinally through the middle of the machine; and Figs. 3, 4,5, and 6 are detached views of parts thereof.

A designates the frame of the machine; B, the blower; C, the air-chuteto conduct the blast from the blower, all as in various prior machines;and D designates the dust-arrester, substantially the same as patentedto me March 21, 1876. E designates the verticallyvibrating screen,provided at its lower end with two chutes, a b, the one, a, leading intothe dust-arrester D, and the other into the hopper F. Toward the upperend of the screen is a cross-beam, e, reaching the top, but leaving asmall space between its lower edge and the screen, as shown in Fig. 2.

Instead of vibrating the screen laterally, as in my former patent abovenamed, the screen E is hung on a horizontal shaft, 01, supported by theframe A, so as to vibrate vertically,

the part belowthe shaft ;being longer and heavier than the part aboveit, so that gravity causes said lower end to have a constant downwardpressure upon the cam f of the main shaft g. The screen, as thussupported, stands upon an incline, as shown. The lower end is coveredover by a cover, h,- and, if desired, a spring, i, may be added, toinsure a quick depression of the lower end of the screen.

At the effluent end of the air-chute .F, the upper side or cover is ismade adjustableon hinges, something as in my former patent; but theair-chute is carried down lower, so as to bring this cover k at agreater angle of inclination, and parallel to the apron. Through thishinged portion of the cover 70 is an openingleading into thehopper F,which is under the lower endof the screen-chute b One side, 1, of thehopper maybe adjustable, in order to better catch the material flowingfrom the screen. Upon the under side of the cover is isthe apron m,secured by screws passing through slots in the apron into the cover k,and with straight ledges or bars under each end, to hold the apron at aproper distance from and'parallel to the chute-cover k under all itsvarious adjustments, while the slots in the apron and sG Q WS are foradjust.- ing the edge of the apron up or down to its proper place whenthe angle of its inclination is changed. A detached view of the under.side of one end of the apron is shown in Fig. 6.

Underneath the apron, on each side of the machine, is an adjustablestop, n, provided with a longitudinal slot, through which a screwpasses, and on which stops the apron and chutecover k are supported. Byadjusting the stops the apron and chute-cover can be adjusted to anydesired inclination; and in case the parallel space between thechute-cover 7c and apron m re quires to be increased or diminished, itcan be done by changing the bars or blockijng between said parts.

Rolling-barrel refuse is placed in the screen E above the cross-beam e,and motion is im. parted to the main and blower shafts in any propermanner, when the rapid motion of the cam f on main shaft 9', togetherwith the weighted end of the screen, causes said screen to be violentlyagitated on its shaft to shake the finer material, dust, ashes, &c.,through the sieve or screen, and into the dust-arrester by way of thechute a, while the coarser material, iron, coal, 850., will pass underthe cross beam e, and down through the chute 11 into the hopper F, fromwhich it flows into the parallel space between the apron m andchutecover10, where the air-blast throws the coal and lighter material up over theupper edge of the apron, and out at the rear of the machine, while theiron, which is the heavier material, will pass downward and into thereceptacle Gr. 7

Under different air-blastsdifferent adjustments are required. Thestronger the blast the steeper should the inclination of the apron be.If coal,cinders,&c., should work down into the receptacle with the iron,then the blast is too feeble for the inclination of the apron, whichshould be let down to an angle of less inclination until the coal,cinders, 850., are carried over its upper edge.

By loosening the screws on the under side of the apron it can be raisedor lowered, so as to leave the opening at its foot of the proper width,and bring its top edge up higher than the opening in the chute-cover Iaunder the hopper.

By making the adjacent sides of the chutecover k and apron on parallelunder all adjustments, the air-blast is substantially of the samecompactness and strength for the whole length of the space between them,so that in case coal, &c., should work down tothe lower part of theapron it will be blown back, whereas in case the space at the lower partof the apron were wider, the blast would be weaker, and coal, &c.,working down into this weak blast would not be blown backward and upwardwith that certainty which is attendant upon a blast confined in theparallel space.

By making the screen vibrate vertically instead of laterally, theagitating-cam can be located on the main shaft, thereby rendering themachine more simple, and requiring less power to run it.

The screen is also agitated more violently at its upper end than whenhung as in my former patent, while the cross-beam retains the materialput into the screen at the upper end until it is substantially screenedfrom dust, &c., before it can pass under said beam and down into thechute b.

In order to compensate for wear, I place a metal guard, 0, under the endof the screenchute for the cam f to work against, the same being shownby an enlarged view in Fig. 3.

The guard proper, 0, is made of hardened steel, and it is dovetailedinto ametal socket, H, Fig. 3, which can be secured or bolted to theunder side of the screen-chute and by making the guard dovetailed it canreadily be removed, and a new one inserted at a very small cost.

Instead of this dovetailed socket, a hardened disk of steel might bebolted to the screen-chute, in such a position that the cam f willengage it near the edge, and when it becomes worn the bolt can beloosened and the disk rotated sufficiently to bring an unworn surfaceinto engagement with the cam.

Upon one of the cross-beams of the frame of the machine, and under thelower end of the screen-chute, there is an adjustable stop, u, toregulate the vibration of the screen and chute 1), upon which stop thescreen falls when not elevated by the cam f. This stop uis slotted, andheld in place by a screw or screws passing through said slots, wherebythe stop can be moved forward or backward, as may be desired, andthereby stop the descent of the chute b and the screen at a greater orless elevation, and consequently allowing the cam f to vibrate the chuteand screen with a greater or less motion, as may be desired.

I also make the cam fin parts, to compensate for wear. Fig. 4 is alongitudinal section of said cam, and Fig. 5 a transverse section.

The hub I is provided with longitudinal dovetailed recesses, as shown inFig. 5, and it is held in place on the main shaft by the setscrew 19.Detachable steel teeth 8 are inserted endwise in the dovetailedrecesses, and held in place by the collar q, also secured to the mainshaft by a set-screw, 1'. When theseteeth .9 become too much worn foruse, or broken, the collar can be set back, the old teeth removed, andnew ones inserted at a Very small cost. i

' I claim as my invention- 1. In a separator, the screen E, havin gcrossbeam 6 a little below its upper end, a single pair of horizontalbearings between its ends, on which the screen can oscillate to vibrateits ends vertically, and the two chutes a and b at its lower end,substantially as described, and for the purpose specified.

2. In a separator, the screen E having crossbeam e a little below itsupper end, the chute b at its lower end, and a single pair of horizontalbearings between its ends, on which the screen can oscillate to vibrateits ends vertically, in combination with mechanism for 0s cillating saidscreen and its above-named parts, substantially as described, and forthe purpose specified.

3. In a separator, the screen E, having crossbeam 6 a little below its.upper end, a single pair of horizontal bearings between its ends, onwhich the screen can oscillate to vibrate its ends vertically, and thechute b,provided withcover h at its lower end, substantially asdescribed, and for the purpose specified.

4.. In a separator, the adjustable chute-cover k, in combination withthe apron m, having their adjacent sides adjusted parallel to eachother, substantially as described, and for the purpose specified.

5. In a separator, the combination of hinged chute-cover k, apron m,slotted at its ends and adjustably secured to said cover, and theadjustable stops on the sides of the frame, substantially as described,and for the purpose specified.

OLIVER D. WOODRUFF. Witnesses: WALTER S. MERRELL, JULIA MERRELL.

